Dr. Sara Webb and researchers at the University of Washington want to learn more about the similarities and differences between individuals with Fragile X Syndrome or Autism. In Fragile X Syndrome, one of the most noted behaviors is eye gaze avoidance. In Autism, shared attention deficits are one of the most consistent symptoms. While both groups demonstrate impairments or alterations in the use of eye gaze, it is unclear if these behaviors share the same underlying neural mechanisms.